Dynamical Evolution of Galaxy Groups. A comparison of two approaches

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dc.creatorGarcia-Gomez, C.
dc.creatorAthanassoula, E.
dc.creatorGarijo, A.
dc.date1996-03-06
dc.date.accessioned2026-07-07T02:20:58Z
dc.date.available2026-07-07T02:20:58Z
dc.descriptionIn this paper we test the performance of explicit simulations of groups of galaxies, (i.e. simulations in which each galaxy is treated as a mass point and the physics of the interactions is modelled by specific analand the physics of the interactions is modelled by specific analytical prescriptions for merging conditions), by comparing them with fully self-consistent simulations starting from identical initial conditions. The quality of the explicit simulations is very unequal. For somThe quality of the explicit simulations is very unequal. For some prescriptions the results are complete disagreement with the self-consistent simulations. The inclusion of other dynamical effects like dynamical friction gives, in some cases, better agreeement.like dynamical friction gives, in some cases, better agreeement. We also propose a new merging criterion, which, combined with dynamical friction, gives much better agreement with self-consistent simulations in a variety of initial conditions, but even this criterion has a limited ranof initial conditions, but even this criterion has a limited range of applicability.
dc.description17 pages LaTex, 10 Postscript figures, uses a4.sty, a4wide.sty. To appear in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9603022
dc.identifierhttp://arxiv.org/abs/astro-ph/9603022
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/10393
dc.subjectAstrophysics
dc.titleDynamical Evolution of Galaxy Groups. A comparison of two approaches
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